H1Z1 right now, especially since you sort of can't. The game's servers went down last night for a quick fix, according to Sony Online Entertainment president John Smedley; they've been down since, with players getting increasingly vocal and anxious about what comes next. No further updates have come from the company after Smedley's assurance that there are issues to be fixed that cannot be solved simply by rolling back to the previous patch.
Once players can get back in to the game, there may very well be a server wipe greeting them (a possibility suggested by the technical director), although perks like tickets, crates, and cosmetic recipes will not be lost in the event of a server wipe. SOE has promised to give plenty of notice before taking such drastic measures. Players are divided on whether this is a good thing or not, although widespread reports of item duping sit at the root of the issue. There's still no ETA on when the servers will be back online or what will be fixed when they come back up, but players could be looking at a very different environment.
[Update: Servers appear to be up again now. SOE has said that the promised European servers are still incoming: "getting MORE servers, still calculating what we can fit."]